Grizzly Bear (Ursus arctos horribilis) is also known as silvertip bear, it is a subspecies of brown bear. They generally live in the upper lands of western North America. Grizzly bears are North America’s 2nd largest land carnivore of all, after thePolar Bear Polar Bear. The word grizzly from its name came from the word grizzled, which refer to big grizzly fur. However, when naturalist George Ord named the Grizzly Bear in 1815, he had misunderstood the word “grisly” instead of “grizzly”, which lead to "horribilis” for its subspecific name. General Information
Level
Classification
Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Carnivora
Family
Ursidae
Genus
Ursus
Species
U. arctos
Habitat
Bears were one of the top predators on the planet, unfortunately human invented weapons which take over and defeated them. Grizzly Bear can be found in woodlands and mountain area in Asia, North America and Europe, giving them one of the widest ranges compared to other bear type species of its family. Small group of the species can still be found Asia. Grizzly Bear are originally from Eurasia. However, they started to move to western North America in around 50,000 years ago.
Fortunately, Grizzly bears are able to adapt easily to all kinds of climates, from high ground mountains to deserted areas. Their preferred habitats are rivers, Rocky Mountains, dense forests, opened area of meadows, and large valleys. Grizzly bears, like most predators scout for food that will easily and quickly satisfy their needs. Grizzly bears diet consists not only of meat matter but also vegetable matter, including flowers, berries, grasses, tubers, all kind of nuts, fish, Rabbit, honey, and other small animals such as ground squirrels. These give them a wide range of selection in order to survive over extreme conditions.
There were about approximately 25,000 grizzly bears in North America when the European first arrives. However, the population of the species substantially decrease due to the hunting by human. it was estimated that there were approximately 16,000 grizzly bears left at the end of 2008.
Now day’s grizzly bear has legal protection in countries like Europe and in the United States due to over hunting and other human related activities. Human causes around 6,335 deaths in average grizzlies every year. The natural life span of grizzly bears can be over 20 years. Unfortunately, 95% of the this species, who live past the age 2 in North America are dead due to over hunting by human. The species are rarely to be seen by any human except for the scientist who researching them now days.
Structural Adaptations 1):
Thinking of the most deadly and powerful weapons of bears, the first thing come to you mind should be their claws. Each Grizzly bear have a pair claw which would grow up to 5 inches long. It could kill a normal man with just 1 strike. The claws are brown and are mainly used to dig for food underground. The large claws are able either to protect themself from, danger and also to catch their prey.
Environmental pressure to this adaptation:
Since some of their preys such as ground squirrels, mice and marmots are often located under the ground. They are force to develop a set of front paws that are large, strong and slightly curved to hunt their preys more effectively. These powerful claws also allow them to protect themself from being the game of other animals.
Structural Adaptations 2):
Talking about the most important role of hunting food and support the species basic lifestyle, it would definitely be their distinctive muscular shoulder hump. This hump is made of fat and muscle. The muscular shoulder hump is an adaptation for digging food such as ground squirrels, mice and other small mammals underground.It is also for attaining bursts of speed when necessary for capture of moose or caribou for food.
Environmental pressure to this adaptation:
In order to dig holes more effectively and hunt, the grizzly bears are force to have power muscular shoulder hump that supply energy to their front paws. It gives the species bursts of speed and power to hunt down those large and fast animals.
Behavioural Adaptation 1):
This species doesn’t live in a group instead it has a solitary behaviour that likes to live on their own. They would only meet up with other individuals at breeding seasons occurs in June and July. When the bears reach to maturity, at around 5 years old, the male will then choose his mating partner and spends an approximately 4 weeks mating with her. They will then separate and leaves to continue on their own solitary life.
Environmental pressure to this adaptation:
Since they have a solitary behaviour, they are aggressive and will get angry fast and easily. They are fearful once they get into a fight and will attack any object that seems to be a threat. However, Grizzly bears are normally peaceful and they would try to avoid fighting and run from danger situation.
Behavioural Adaptation 2):
At the start of winter, the species will prepare hibernation and could get up to 400lb. Normally the bear will wait till there is a substantial snowstorm before it enters its den. By doing so it will reduce the rise of letting predators locating its den
Environmental pressure to this adaptation:
When the grizzly bear enter hibernation, the risk of getting hunt by other predictors will dramatically increase. Though time this species slowly learned to not enters its den before there is a substantial snowstorm. Thought this behavioural adaptation it will increase the chance of living for this species.
Physiological Adaptation:
Like every other mammal, Grizzly bear is a warm blooded species and so are all bear species. Normally any species that live in colder temperature areas for long period of time are warm blooded. Their body can generate heat from their own metabolism in order to let them survive over extreme weather.
Environmental pressure to this adaptation:
In order to still warm during winter, the species itself must generate heat to survive during winter when it hibernates. However, cold blooded means its environment determined its body temperature. In order to increase the chance of living, the species slowly developed its own boy body heat by having warmer bloody.
Ancient Animal - Caver Bear
Future Animal
Grizzly Bear
Grizzly Bear (Ursus arctos horribilis) is also known as silvertip bear, it is a subspecies of brown bear. They generally live in the upper lands of western North America. Grizzly bears are North America’s 2nd largest land carnivore of all, after thePolar Bear Polar Bear. The word grizzly from its name came from the word grizzled, which refer to big grizzly fur. However, when naturalist George Ord named the Grizzly Bear in 1815, he had misunderstood the word “grisly” instead of “grizzly”, which lead to "horribilis” for its subspecific name.
General Information
Habitat
Bears were one of the top predators on the planet, unfortunately human invented weapons which take over and defeated them. Grizzly Bear can be found in woodlands and mountain area in Asia, North America and Europe, giving them one of the widest ranges compared to other bear type species of its family. Small group of the species can still be found Asia. Grizzly Bear are originally from Eurasia. However, they started to move to western North America in around 50,000 years ago.
Fortunately, Grizzly bears are able to adapt easily to all kinds of climates, from high ground mountains to deserted areas. Their preferred habitats are rivers, Rocky Mountains, dense forests, opened area of meadows, and large valleys. Grizzly bears, like most predators scout for food that will easily and quickly satisfy their needs. Grizzly bears diet consists not only of meat matter but also vegetable matter, including flowers, berries, grasses, tubers, all kind of nuts, fish, Rabbit, honey, and other small animals such as ground squirrels. These give them a wide range of selection in order to survive over extreme conditions.
There were about approximately 25,000 grizzly bears in North America when the European first arrives. However, the population of the species substantially decrease due to the hunting by human. it was estimated that there were approximately 16,000 grizzly bears left at the end of 2008.
Now day’s grizzly bear has legal protection in countries like Europe and in the United States due to over hunting and other human related activities. Human causes around 6,335 deaths in average grizzlies every year. The natural life span of grizzly bears can be over 20 years. Unfortunately, 95% of the this species, who live past the age 2 in North America are dead due to over hunting by human. The species are rarely to be seen by any human except for the scientist who researching them now days.
Structural Adaptations 1):
Thinking of the most deadly and powerful weapons of bears, the first thing come to you mind should be their claws. Each Grizzly bear have a pair claw which would grow up to 5 inches long. It could kill a normal man with just 1 strike. The claws are brown and are mainly used to dig for food underground. The large claws are able either to protect themself from, danger and also to catch their prey.Environmental pressure to this adaptation:
Since some of their preys such as ground squirrels, mice and marmots are often located under the ground. They are force to develop a set of front paws that are large, strong and slightly curved to hunt their preys more effectively. These powerful claws also allow them to protect themself from being the game of other animals.
Structural Adaptations 2):
Talking about the most important role of hunting food and support the species basic lifestyle, it would definitely be their distinctive muscular shoulder hump. This hump is made of fat and muscle. The muscular shoulder hump is an adaptation for digging food such as ground squirrels, mice and other small mammals underground.It is also for attaining bursts of speed when necessary for capture of moose or caribou for food.Environmental pressure to this adaptation:
In order to dig holes more effectively and hunt, the grizzly bears are force to have power muscular shoulder hump that supply energy to their front paws. It gives the species bursts of speed and power to hunt down those large and fast animals.Behavioural Adaptation 1):
This species doesn’t live in a group instead it has a solitary behaviour that likes to live on their own. They would only meet up with other individuals at breeding seasons occurs in June and July. When the bears reach to maturity, at around 5 years old, the male will then choose his mating partner and spends an approximately 4 weeks mating with her. They will then separate and leaves to continue on their own solitary life.
Environmental pressure to this adaptation:
Since they have a solitary behaviour, they are aggressive and will get angry fast and easily. They are fearful once they get into a fight and will attack any object that seems to be a threat. However, Grizzly bears are normally peaceful and they would try to avoid fighting and run from danger situation.Behavioural Adaptation 2):
At the start of winter, the species will prepare hibernation and could get up to 400lb. Normally the bear will wait till there is a substantial snowstorm before it enters its den. By doing so it will reduce the rise of letting predators locating its denEnvironmental pressure to this adaptation:
When the grizzly bear enter hibernation, the risk of getting hunt by other predictors will dramatically increase. Though time this species slowly learned to not enters its den before there is a substantial snowstorm. Thought this behavioural adaptation it will increase the chance of living for this species.Physiological Adaptation:
Like every other mammal, Grizzly bear is a warm blooded species and so are all bear species. Normally any species that live in colder temperature areas for long period of time are warm blooded. Their body can generate heat from their own metabolism in order to let them survive over extreme weather.Environmental pressure to this adaptation:
In order to still warm during winter, the species itself must generate heat to survive during winter when it hibernates. However, cold blooded means its environment determined its body temperature. In order to increase the chance of living, the species slowly developed its own boy body heat by having warmer bloody.
Referencing:
1) Wikipedia (2010) Grizzly Bear wiki. Retrieved 24-6-2010
http://en.wikipedia.org/wiki/Grizzly_Bear
2) ENDANGERED WILDLIFE, GRIZZLY BEARS. Retrieved 12-7-2010
http://www.edu.pe.ca/southernkings/grizzly.htm#top
3) WikiAnswers (2010) Are grizzly bears warm or cold blooded?. Retrieved 15-7-2010
http://wiki.answers.com/Q/Are_grizzly_bears_warm_or_cold_blooded
4) Wikipedia (2010) Bear wiki. Retrieved 13-7-2010
http://en.wikipedia.org/wiki/Bear